Steven Rostedt
59df055f19
ftrace: trace different functions with a different tracer ...
Impact: new feature
Currently, the function tracer only gives you an ability to hook
a tracer to all functions being traced. The dynamic function trace
allows you to pick and choose which of those functions will be
traced, but all functions being traced will call all tracers that
registered with the function tracer.
This patch adds a new feature that allows a tracer to hook to specific
functions, even when all functions are being traced. It allows for
different functions to call different tracer hooks.
The way this is accomplished is by a special function that will hook
to the function tracer and will set up a hash table knowing which
tracer hook to call with which function. This is the most general
and easiest method to accomplish this. Later, an arch may choose
to supply their own method in changing the mcount call of a function
to call a different tracer. But that will be an exercise for the
future.
To register a function:
struct ftrace_hook_ops {
void (*func)(unsigned long ip,
unsigned long parent_ip,
void **data);
int (*callback)(unsigned long ip, void **data);
void (*free)(void **data);
};
int register_ftrace_function_hook(char *glob, struct ftrace_hook_ops *ops,
void *data);
glob is a simple glob to search for the functions to hook.
ops is a pointer to the operations (listed below)
data is the default data to be passed to the hook functions when traced
ops:
func is the hook function to call when the functions are traced
callback is a callback function that is called when setting up the hash.
That is, if the tracer needs to do something special for each
function, that is being traced, and wants to give each function
its own data. The address of the entry data is passed to this
callback, so that the callback may wish to update the entry to
whatever it would like.
free is a callback for when the entry is freed. In case the tracer
allocated any data, it is give the chance to free it.
To unregister we have three functions:
void
unregister_ftrace_function_hook(char *glob, struct ftrace_hook_ops *ops,
void *data)
This will unregister all hooks that match glob, point to ops, and
have its data matching data. (note, if glob is NULL, blank or '*',
all functions will be tested).
void
unregister_ftrace_function_hook_func(char *glob,
struct ftrace_hook_ops *ops)
This will unregister all functions matching glob that has an entry
pointing to ops.
void unregister_ftrace_function_hook_all(char *glob)
This simply unregisters all funcs.
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
2009-02-16 22:44:09 -05:00
Merge branch 'core/xen' into x86/urgent
2009-02-04 14:54:56 +01:00
Merge branches 'release', 'asus', 'bugzilla-12450', 'cpuidle', 'debug', 'ec', 'misc', 'printk' and 'processor' into release
2009-02-07 01:34:56 -05:00
hrtimers: allow the hot-unplugging of all cpus
2009-01-30 22:35:29 +01:00
ftrace: trace different functions with a different tracer
2009-02-16 22:44:09 -05:00
[CVE-2009-0029] System call wrappers part 04
2009-01-14 14:15:19 +01:00
async: use list_move_tail
2009-02-08 10:00:26 -08:00
[PATCH] fix broken timestamps in AVC generated by kernel threads
2008-12-09 02:27:41 -05:00
fixing audit rule ordering mess, part 1
2009-01-04 15:14:41 -05:00
audit: validate comparison operations, store them in sane form
2009-01-04 15:14:42 -05:00
audit: validate comparison operations, store them in sane form
2009-01-04 15:14:42 -05:00
make sure that filterkey of task,always rules is reported
2009-01-04 15:14:42 -05:00
[CVE-2009-0029] System call wrappers part 04
2009-01-14 14:15:19 +01:00
cgroups: fix lockdep subclasses overflow
2009-02-11 14:25:36 -08:00
cgroups: fix probable race with put_css_set[_taskexit] and find_css_set
2008-10-20 08:52:38 -07:00
freezer_cg: disable writing freezer.state of root cgroup
2008-11-12 17:17:16 -08:00
Allow times and time system calls to return small negative values
2009-01-06 15:59:13 -08:00
kernel/configs.c: remove useless comments
2008-10-20 08:52:34 -07:00
stop_machine/cpu hotplug: fix disable_nonboot_cpus
2009-01-07 11:36:14 -08:00
cpuset: fix possible deadlock in async_rebuild_sched_domains
2009-01-19 02:44:00 +01:00
CRED: Inaugurate COW credentials
2008-11-14 10:39:23 +11:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6
2009-01-09 13:59:25 -08:00
schedstat: consolidate per-task cpu runtime stats
2008-12-18 13:54:01 +01:00
dma-coherent: Restore dma_alloc_from_coherent() large alloc fall back policy.
2009-01-21 18:51:53 +09:00
kernel/dma.c: remove a CVS keyword
2008-10-16 11:21:30 -07:00
[CVE-2009-0029] System call wrappers part 04
2009-01-14 14:15:19 +01:00
signal: re-add dead task accumulation stats.
2009-02-05 13:04:33 +01:00
tracing/function-graph-tracer: drop the kernel_text_address check
2009-02-09 10:51:38 +01:00
Merge branch 'timers-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2009-02-11 08:24:32 -08:00
freezer_cg: use thaw_process() in unfreeze_cgroup()
2008-10-30 11:38:45 -07:00
[CVE-2009-0029] System call wrappers part 31
2009-01-14 14:15:31 +01:00
CRED: Use RCU to access another task's creds and to release a task's own creds
2008-11-14 10:39:19 +11:00
hrtimer: prevent negative expiry value after clock_was_set()
2009-01-30 22:35:34 +01:00
timers: split process wide cpu clocks/timers
2009-02-05 13:04:33 +01:00
Revert "kbuild: strip generated symbols from *.ko"
2009-01-14 21:38:20 +01:00
container freezer: implement freezer cgroup subsystem
2008-10-20 08:52:34 -07:00
rcu: provide RCU options on non-preempt architectures too
2008-12-25 09:31:28 +01:00
[CVE-2009-0029] System call wrappers part 07
2009-01-14 14:15:20 +01:00
kmod: fix varargs kernel-doc
2009-01-06 15:59:27 -08:00
kprobes: check CONFIG_FREEZER instead of CONFIG_PM
2009-01-16 14:32:17 -05:00
kernel/ksysfs.c:fix dependence on CONFIG_NET
2009-01-06 10:44:31 -08:00
tracepoints: add DECLARE_TRACE() and DEFINE_TRACE()
2008-11-16 09:01:36 +01:00
KSYM_SYMBOL_LEN fixes
2008-12-10 08:01:54 -08:00
Merge branch 'core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2008-12-30 16:10:19 -08:00
lockstat: contend with points
2008-10-20 15:43:10 +02:00
kernel/up.c: omit it if SMP=y, USE_GENERIC_SMP_HELPERS=n
2009-01-14 09:42:11 -08:00
markers/tracpoints: fix non-modular build
2008-11-16 09:52:03 +01:00
tracing/function-graph-tracer: drop the kernel_text_address check
2009-02-09 10:51:38 +01:00
mutex: __used is needed for function referenced only from inline asm
2008-11-24 10:00:28 +01:00
Merge commit 'v2.6.28-rc6' into core/debug
2008-11-26 08:22:50 +01:00
ns_cgroup: remove unused spinlock
2009-01-08 08:31:02 -08:00
User namespaces: set of cleanups (v2)
2008-11-24 18:57:41 -05:00
oops: increment the oops UUID every time we oops
2009-01-06 15:59:12 -08:00
Fix compile warning in kernel/params.c
2008-10-23 12:09:00 -07:00
pid: generalize task_active_pid_ns
2009-01-08 08:31:12 -08:00
timers: fix TIMER_ABSTIME for process wide cpu timers
2009-02-11 14:04:21 +01:00
[CVE-2009-0029] System call wrappers part 05
2009-01-14 14:15:20 +01:00
[CVE-2009-0029] System call wrappers part 27
2009-01-14 14:15:29 +01:00
profiling: fix broken profiling regression
2009-02-10 00:50:37 +01:00
[CVE-2009-0029] System call wrappers part 27
2009-01-14 14:15:29 +01:00
rcu: add __cpuinit to rcu_init_percpu_data()
2009-01-14 11:26:40 +01:00
rcu: eliminate synchronize_rcu_xxx macro
2009-01-05 10:18:08 +01:00
rcu: eliminate synchronize_rcu_xxx macro
2009-01-05 10:18:08 +01:00
"Tree RCU": scalable classic RCU implementation
2008-12-18 21:56:04 +01:00
rcu: fix bug in rcutorture system-shutdown code
2009-01-07 23:36:25 +01:00
rcu: add __cpuinit to rcu_init_percpu_data()
2009-01-14 11:26:40 +01:00
"Tree RCU": scalable classic RCU implementation
2008-12-18 21:56:04 +01:00
Merge branches 'tracing/ftrace', 'tracing/kmemtrace' and 'linus' into tracing/core
2009-02-03 06:25:38 +01:00
memcg: memory cgroup resource counters for hierarchy
2009-01-08 08:31:05 -08:00
resources: fix parameter name and kernel-doc
2009-01-15 16:39:38 -08:00
Merge branches 'tracing/ftrace', 'tracing/ring-buffer', 'tracing/sysprof', 'tracing/urgent' and 'linus' into tracing/core
2009-02-13 10:25:18 +01:00
sched_clock: prevent scd->clock from moving backwards, take #2
2008-12-31 09:53:21 +01:00
sched: fix section mismatch
2009-01-06 11:07:15 +01:00
sched: convert struct cpupri_vec cpumask_var_t.
2008-11-24 17:52:22 +01:00
sched: partly revert "sched debug: remove NULL checking in print_cfs_rt_rq()"
2009-01-11 02:40:32 +01:00
sched: revert recent sync wakeup changes
2009-02-11 14:43:35 +01:00
sched: backward looking buddy
2008-11-05 10:30:14 +01:00
sched: add CONFIG_SMP consistency
2008-10-22 10:01:52 +02:00
sched_rt: don't use first_cpu on cpumask created with cpumask_and
2009-02-01 10:49:52 +01:00
timers: split process wide cpu clocks/timers
2009-02-05 13:04:33 +01:00
signal: re-add dead task accumulation stats.
2009-02-05 13:04:33 +01:00
generic-ipi: use per cpu data for single cpu ipi calls
2009-01-30 18:31:08 +01:00
trace, lockdep: manual preempt count adding for local_bh_disable
2009-01-23 11:10:57 +01:00
softlock: fix false panic which can occur if softlockup_thresh is reduced
2009-01-14 11:48:07 +01:00
stacktrace: provide save_stack_trace_tsk() weak alias
2008-12-25 11:44:43 +01:00
stop_machine: introduce stop_machine_create/destroy.
2009-01-05 08:40:14 +10:30
revert "rlimit: permit setting RLIMIT_NOFILE to RLIM_INFINITY"
2009-02-05 12:56:47 -08:00
[CVE-2009-0029] Make sys_syslog a conditional system call
2009-01-14 14:15:16 +01:00
mm: fix dirty_bytes/dirty_background_bytes sysctls on 64bit arches
2009-02-11 14:25:35 -08:00
[XFS] remove restricted chown parameter from xfs linux
2008-10-30 18:30:09 +11:00
cpumask: convert rest of files in kernel/
2009-01-01 10:12:28 +10:30
kprobes: add tests for register_kprobes
2009-01-06 15:59:20 -08:00
[CVE-2009-0029] System call wrappers part 01
2009-01-14 14:15:18 +01:00
[CVE-2009-0029] System call wrappers part 27
2009-01-14 14:15:29 +01:00
markers/tracpoints: fix non-modular build
2008-11-16 09:52:03 +01:00
mm: introduce get_mm_hiwater_xxx(), fix taskstats->hiwater_xxx accounting
2009-01-06 15:59:09 -08:00
[CVE-2009-0029] System call wrappers part 19
2009-01-14 14:15:26 +01:00
smp_call_function_single(): be slightly less stupid, fix #2
2009-01-12 16:04:37 +01:00
Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2008-12-28 12:27:58 -08:00
User namespaces: set of cleanups (v2)
2008-11-24 18:57:41 -05:00
sysctl: simplify ->strategy
2008-10-16 11:21:47 -07:00
wait: prevent exclusive waiter starvation
2009-02-05 12:56:48 -08:00
Merge branches 'tracing/ftrace', 'tracing/kmemtrace' and 'linus' into tracing/core
2009-02-03 06:25:38 +01:00
59df055f19